Meazure - What are the dimensions of that image? How big is this window?
Bulk Image Downloader - With Bulk Image Downloader you can download full sized images from almost any web gallery.
Bluegrams Screen Ruler - A lightweight and configurable ruler tool for Windows Desktop.
Vov Picture Downloader - Download pictures from websites.
ScreenRuler - ScreenRuler lets you measure objects on your Ubuntu desktop using six different metrics.
WFDownloader App - A free bulk image downloader application that also serves as a multi-purpose bulk downloader for your PC.